450 Coleopterological Notices, V. 



the frontal margin, a long deep abrupt evenly and feebly arcuate groove, not 

 connected in any way with the fovese but flexed obtusely outward at the sides, 

 crossing the antennal tubercles ; eyes moderate ; tempora convergent behind 

 them ; antennae nearly as long as the head and prothorax, with the last joint 

 subequal to the five preceding ; under surface with rather dense erect setae. 

 Prothorax but slightly wider than long, widest and rather strongly rounded at 

 the middle, the sides convergent and straight thence to the base ; apex broadly 

 and feebly subtubulate ; median sulcus not quite attaining the apex, the 

 transverse line beyond basal fourth. Elytra subquadrate, the humeri much 

 more rectangular and wide exposed than in granulosus, nearly twice as wide 

 as the prothorax ; three discal striae distinct, the outer veiy short. Abdomen 

 scarcely as long as the elytra — viewed vertically — and but slightly narrower, 

 the first dorsal not in the least longer than the second. Length 1.2 mm.; 

 width 0.45 mm. 



California (San Francisco and Sta. Cruz Cos.). 



The male sexual characters are feeble, the fourth dorsal being 

 broadly impressed at each side of the base, each impression extend- 

 ing from near the middle to near the lateral margin and having its 

 posterior limiting line posteriorly arcuate, the impressed surface 

 glabrous polished and impunctate; the punctures of the third dorsal 

 become very dense along the apical margin, the latter not otherwise 

 abnormal. In the male of granulosus the two basal impressions 

 are almost contiguous. The sculpture of the head in both of these 

 species is altogether different from anything known in Oropus. 



In canaliculatus the general features of cephalic sculpture are the 

 same, but in the male of that species the transverse frontal marginal 

 ridge is tuberculate in the middle, and, further, the fourth dorsal is 

 not modified, the venter having a broad shallow lunate impression 

 near the apex. These differences, taken in connection with elytral 

 structure, may be of subgeneric value. 



RAHECIA n. gen. 



The true affinities of this genus are rather difficult to state, for, 

 in spite of its great similarity to Euplectus, it has the second tarsal 

 claw well developed, and differs considerably besides in the struc- 

 ture of the mouth and palpal fossae. The species also differ much 

 among themselves, especially in general appearance, but are suffi- 

 ciently homogeneous in oral and pronotal structure, as well as other 

 essential points of organization. 



The most variable of the minor structural features is perhaps the 

 abdominal carinse. These are short in all, and, in one at least, be- 



